M is for murmuration. Isn't it wonderful? But this is going to be M is for mer. As in la mer. The sea. Sea swimming. I hear a collective sigh. Not again. You get it. Swimming in cold water is amazing, give her a biscuit. But I was wondering, what is it about this cold sea swimming thing that works for me? Oh yes, bragging opportunities, being at one with nature (if Brighton beach constitutes nature), the build-up of brown fat, camaraderie, (though I tend to be on the antisocial [...]